The standards used in my country's metallurgical products are national standards (code-named 'GB'), Ministry standards (Ministry of Metallurgical Industry Standards 'YB', First Machinery Ministry Standards 'JB', etc.), the gross weight, net weight and tare weight should be indicated on the package. (1) Packaging inspection shall be determined according to the type, shape, size, precision and corrosion protection of metal materials.
Normal length (indefinite length): The length is not specified, but it must be within a specified length (depending on the variety, the length is different, according to the department and factory). The staff engaged in metal materials must master the relevant content of the standard. (4) Inspection of quantity The quantity of metal materials generally refers to the weight (except for a few cases of backing plates and fishplates, which are counted in pieces). Shaft: refers to wire, steel wire rope, steel strand, etc. 18. of the material. 4.
The quantity inspection methods are as follows: 17. Nominal size (nominal size): It is the ideal size that people want in production, but there is a certain gap between it and the actual size. Printing: robot bearing suppliers The method of stamping or spraying paint on the specified parts of the metal material (end face, end), indicating the brand, specification, standard number, etc. Short ruler (narrow ruler): The length is less than the lower limit of the prescribed general length dimension, but not less than the prescribed minimum allowable length. 11. Size deviation
: The difference between actual size and nominal size is called size deviation. For some metal materials, part of the 'short ruler' can be handed in as required. Box (barrel): Refers to anti-corrosion, small and thin products, such as tinplate, silicon steel sheet, magnesium ingot, etc. In the inspection of specifications and dimensions, attention should be paid to the measurement of material parts and the selection of appropriate measuring tools. Mainly used for medium and heavy plates, profiles, non-ferrous materials, etc